Goodyear Tire & Rubber (GT) had the highest return in 1968 by a small-cap US stock, returning 3%.

ASSET	YEAR	% RETURN
Goodyear Tire & Rubber (GT)	1968	2.99%
Xerox (XRX)	1968	-11.72%

Small-cap stocks are treated as having a market cap between $300M and $2B.